______,Turn heat lower, add veggies, water, beer, and chopped herbs. Season with pepper and salt. Leave it for about 1 1/2 hours on low heat.,At that point, add the piece of bread coated with the mustard, the sugar and the vinegar and leave again for about 1/2 hour.,Taste, season some more if necessary. If sauce is too thick add some cornmeal dissolved in water.,Serve with fries, rice or bread. It's even better the next day and it freezes very well.